What Are the Criteria for Flange Gaskets?

1. GB4622.2-93 winding gasket tube flange series

2. GB9126.1-88 flat steel tube flange with asbestos rubber sheet

3. GB9126.2-88 Convex steel tube flange with asbestos rubber sheet

4. GB9126.3-88 concave convex steel tube flange with asbestos rubber sheet

5. GB9129-88 steel tube flange with asbestos rubber gasket technical conditions

6. GB9130-88 steel tube flange connection with metal ring pad technical conditions

7. HGJ70-91 steel tube flange with flexible graphite composite gasket